The duo shares the small screen with another real life couple, Kaitlin Olson and Rob McElhenney, who themselves became first-time parents to son Axel Lee last September. According to Day, their costars have been generous with the parenting tips.

"People are always willing to give you free advice when you have a baby on the way, so we've gotten more than our fair share – and honestly, we're gonna need it!" he says with a laugh.

Thankfully, the parents-to-be will be on shooting hiatus when their first child is due to make its arrival.

"It's going to time out perfectly," Day explains. "We live in L.A., [so] my East Coast family and her Southern family may have to come see us this Christmas."